Question 1

Which of the following microorganisms is the most resistant to disinfection and sterilization methods?

Accepted Answer

Prions

Question 2

A patient receives a deep puncture wound from a rusty nail. Which portal of entry is most likely involved in this scenario?

Accepted Answer

Broken skin

Question 3

Which of the following is NOT a formed element of blood?

Accepted Answer

Plasma

Question 4

During hematopoiesis, which cell type is responsible for gas transport in the blood?

Accepted Answer

Erythrocyte

Question 5

Which of the following best describes the correct sequence of events in phagocytosis?

Accepted Answer

Chemotaxis → Adherence → Ingestion → Killing → Elimination

Question 6

Alpha and beta interferons protect neighboring cells from viral infection by which mechanism?

Accepted Answer

Inducing the production of antiviral proteins (AVPs) in uninfected cells

Question 7

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 8

What is the main function of neutrophils in the immune response?

Accepted Answer

Phagocytosis of pathogens

Question 9

Which of the following statements about MHC molecules is correct?

Accepted Answer

Class I MHC is found on every nucleated cell

Question 10

A child is born with a genetic defect that prevents the development of the thymus. Which immune cells will be most affected?

Accepted Answer

T cells

Question 11

Which of the following best explains why bacterial endospores are more resistant to disinfectants than most Gram-negative bacteria?

Accepted Answer

Endospores have a thick protein coat and dehydrated core

Question 12

During inflammation, what is the primary effect of increased permeability of venules?

Accepted Answer

More fluid and antimicrobial chemicals enter the tissue

Question 13

Which of the following is a secondary lymphoid organ where immune responses are often initiated?

Accepted Answer

Spleen

Question 14

A virus infects a cell and triggers the release of interferon. What is the next step in the antiviral response according to the interferon pathway?

Accepted Answer

Interferon binds to receptors on neighboring cells

Question 15

Which of the following best describes the process of hematopoiesis?

Accepted Answer

The process of production, multiplication, and specialization of blood cells in the bone marrow

Question 16

Which of the following is the correct order of resistance to disinfection, from most resistant to most susceptible?

Accepted Answer

Prions → Bacterial endospores → Mycobacteria → Enveloped viruses

Question 17

Which of the following is a function of platelets in the blood?

Accepted Answer

Clotting and inflammation

Question 18

A patient with a deficiency in monocytes would have difficulty with which immune process?

Accepted Answer

Phagocytosis and antigen presentation

Question 19

Which of the following best describes the role of Class II MHC molecules?

Accepted Answer

Present antigens to helper T cells

Question 20

If a pathogen enters the body through the conjunctiva of the eye, which type of barrier has it bypassed?

Accepted Answer

Physical barrier

Innate and Adaptive Immunity: Key Concepts and Mechanisms

Study Guide - Practice Questions